Safety locking device



- May 29,'.192'3. 1,456,852

W. KOOT SAFETY LOCKING DEVICE Filed Aug.- 11 1921 2 Sheets-Sheet l @j 1921 2 Sheets-'Shoot 2 W. KOOT SAFETY LOCKING DEVICE Filed Aug. 11.

May 29, 1 923.

Patented May 29, 1923.

WILHELMUS Koo'ryor UTRECHT, NETHERLANDS. 'y

vsaniaztrv LocKING fnnvicn,

applicati@ 1aed augen 11, 1921. serial no. 491,360.-v f

To 'all wiz/omit may concern.:l y

Beit known that LUXVILHELMUSKOOT, metal Worker, subject o'fithe Queenof the Netherlands, residing at Utrecht, in' ythe Kingdom oi' the'Netherlands, Trompstraat 34 have invented certain nen7 and useful limprovements in Safety Locking Devices, ior which I have filed vapplications in Germany, iled February 19th, '1920,' Noi K.

' formed at themsame" angler of. inclination- 72127, granted January 2nd, 1922, under No. 353,703; England, filed June21st, 1921, Linder No. 16963; France-fiiled July'13th, 1921, under No. 147,091,- granted March 15th, 1922, under No. 538,209; Belgium, iled July 1st, 1921, under No. 237,717, and of Which the followingis aspecication. l

This invention relates; to safetyplocks for the doors vof houses, safes,yfor locking chests and travelling trunks and for other purposes. f

According to this invention itis only possible to openfthe Vdoor orchest when a.' pinv is inserted through a number oit'l apertures with a. series of other openings which are distributed over two or more concentrici cylinders, and Whiclrlatter can be turned one in another and yWithin the actual casing-of the lock.Y y

For this object the `actual safety arrangement of the Vlock vconsists 4of a` plurality of cylinders concentrically 'arranged one lin anothery on theperiphery-o'f which av series o? perfor-ations are formed which run ra-A dially toward-s ythe lcommon central axis of all the concentric cylinders.- Accordingly all the-perforations--of.each vcylinder lie in planes, which are'v different but stand ver'- tically to the common central axis of all the cylinders. f

Liese perforations formed inthe sep@ arate cylinders, may either be carried' right through the separate,` cylinders insuch a waythatzan insertedf pin can bei-passed th rou glreach of these perforations radially to the central axis; or they maybe formed in sucha. Way that they are only dummy nerforations .which do not entirely` pass through `the cylindeiwalls, all `these-radialY perforations do not take part in `the actual operation oflocking and opening.

Tliesepradial apertures are actually only means for increasing the vsafety of thelock` by rendering the unauthorized opening more ,axis of the cylinder.

' `diiiicult by misleading -fthefpeirson attempt! ing it When inserting the *pin in the lock.` The actual members by meansiof which the 'lock can-befo'pened, form channelsor perfora-tions which are vformed in thec'onr- 1 y entirely f Centric cylinders and carried y y 1,456,852? l through them;v Each of these perforations is in. a

opening of the lockl and which liesv inthe said plane.

plane. `Which-1. lies `parallel :with the y: l. Each cylinder" has onlyl oi'iep-erforation :which shares :in fthe 'y f The opening of the lock can be l:operate-dv only fi/vhenthe last mentioned perforations f1 coincide ori aire adjustedv in, a straight-line. For kopening the'lock, the :presence .of twol yfurther perforations isjihovvever necessary Which must fall into line with the above mentioned actual-opening ypassages in lthe position'whichisfreadyforOpening. of Y@ case an'dzthe other-on f i these two perforationspone gisjlocatedfin the frontwall .of the theopposite side` of. the. inner tvall'..`

henthe actual opening p'assa'gesrbored throughl the cylinders are adjusted in'one.

line and this line also: coincides zivitlr lthe two apertures formedy in the case,'tlie open-v y. y

`of the. insertion ing of the `loc-k ley-.means pin mentioned, can take place. 1

`The adjustment into the' position ,for openingis elected by .turning thesepfl arate cylinders into the --position` which 'il is only known vtoan initiated person. -fFor-this av rotary By being turned" the" separate cylinders are vthen each br0uglit-rinto .the positionk in lWhichthe.said-periorations form ajcontinuV` y ,c y v i ous/line; l Forv this `objecto-nthe .side'of Asel` n object the` inner cylinder is providedlwithf" arm, `Whilstwtheother vcylinders each have'a pin, on' which" the said armf rests and `whereby the Separate rotation ofV l yeach" cylinder yor."simultaneous rotation. f of yall the-cylinders,is'renderedpossiblethe .casing,on Which the rotary arm rotates,

there corresponds 'a mark ori numberivhich,

as regards this respective cylinder,-indicates v y the end position into Whichfthe .-correspond-- 'j ingy cylinder'must be adjusted infor'der to'` 10'5, L.

`assume the position when the lock is ready" `for opening. f ffe Y l`.To each cylinder one such'mairk. 1s fpror, y

vided..

`marks for? instance, figures or lettersI orre'-y cesses are 'y provided and to eachcylinder ln the same line in which all the perforations or passages and the pertorations in the lock casing coincide Jfor the case of the position ready for opening ot' the lock, there is also a locking bar. When the safety lock is adj usted, this locking bar lies within the lock casing. In the position in which the lock is ready Jfor opening, however it can be pushedA forward by the inserted pin, when it emerges from the casing and lifts the lock latch out of the hook on which this latch rests.

The number of' the 'concentriccylinders may be any suitable one. The safety of the lock against unauthorized opening increases with the number. The number of the positions which the cylinders can assume, that is to say. the. combination possibilities tor safety against unauthorized opening may be calculated by the following formula: c in which a is the number of the marks or signs and n the number of the concentric cylinders. l

The construction may also be carried out in such a way that the movement of the insertion pin is not operated by lhand but `Inechanically by turning a suitable rackgear, the pinv itself being partially7 formed as a toothed rod or rack.Y

' Now referring' to the accompanying drawings. the invention is illustrated in two eX-k amples ot construction. in which Figs. e

showv one form of 'construction in which the movement of the insertion pin 1s effected by hand. and Figs; 5. 6 and 7 an arrangement for mechanically operating the insertion pin. l

i Fig. 1 is a plan view. Fig. 2 a longitudinal section.

Fig. 3 a horizontal section on tudinal a-Xis of the loclr..

`Fig. #l is the insertion pin serving for opening the lock.

Fig. 5 Yis a vertical section of a mechanical means for adjusting the insertion pin.

Fig.A 6 is av view of the device 'from above.

Fig. 7 a view ot the previously mentioned concentric cylinders with the perforations for the passage ot the insertion pin.

1 is the easing of the lock', 2. 3 and et are concentric rings or cylinders, the number of which` in the example illustrated in the drawing, is assumed to be three; 5 are dummy perforations formed in the cylinders which run radially to the central axis. These dummy perforations may be made as desired, either only in the outer cylinder. and thereforeA do not require to be carried through the entire 'cylinder wall. or in case thesev dummy perforations are carried through the outermost cylinder 4t, in order to increase the deception against attempts at unauthorized opening, the middle, or even the innermost cylinder may be provided with perforations or passages running entirely through the cylinder walls or only partially the longibored through, that is to say, vacant passages.

These dummy openings 5 need not share in the opening of the lock, even when all the three cylinders are to be provided with completely l continuous pertorations and when all the perforations of the cylinders are adjusted in one line and they cannot take part in the opening of the lock in conse quencerot their radial position.

The actual opening passages are indicated by 6, which run through all the cylinders but are not carried in them any longer radially to the central'axis but lie in a plane which is parallel with the central axis kot the cylinders. y7 are pertorations arranged in the front and rear part ot the casing which form in common with the perforations 6 the opening channel or passage.

8 is the locking bar which is arranged in thechamber 9 of the casing. and which is underthe action of a spring 10 which tends to return the bar 8 always towards the interior of the chamber 9 and to hold the same therein. 11 is the closing plate of the lock, 10 the hook in which the door latch lies. 13 are the marks to which the separate cylinders are adjusted, and 14: is the rotary arm about which the cylinders 2, 3, 4. are turned by means ot the pins 15, 16 and brought into the position ready for opening. Thei rotary arm 111 may be turned up about its axis of rotation 17 so that the pins 15. 16 according to the positions of the cylinders can be located on any side of the arm.

The action of the lock when moved by hand, is as followst i By turning the arm'` 14. which thereby bears on the pins 15'and 1G` the cylinders 3 and Lle and also the cylinder 2 can be brought into the position ready tor opening. which is indicated for each separate cylinder by a given mark 13 and in which the perforations 6 are adjusted in one line with the perforations 7.

By inserting the pin 18 through these perforations 6 and 7, the rod :8 is pushed through the locking plate 11, whereby the door latch is lifted andthe opening of the door is possible.

In the form ot construction illustrated in Figs. 5. 6 and 7 with mechanical means i'or operating' the insertion pin` l indicates the lock plate and 2. B. 4 and19 are the concentric cylinders. 18 indicates the insertion pin,

which however, in this case is not loose but is compulsorily guided.

:The compulsory guidance is effected by the pin 18 being formed as a rack bar 20 at its endV which is away from the cylinders and the teeth ot this rack bar mesh with Va suitable gear wheel 21.

The adjustment 'of the gear wheel 21 is effected by means of a turn button 22.A The cylinders are provided in the manner hereinbefore described With pertorations or passages which extend right through or are only partially perforated, that is to say, which are blanks. i

In Figs. 5 and 6. Q3 shows a plate, on which the concentric cylinders rest; this plate is provided ivith teeth 24 With which the beak 27 ot' a paivl 25 Which is under the action ot a spring 26 meshes or gears.

The object ot' this arrangement (28, 24, 525, 2G. 2T) is merely to be able to ascertain by audible signals limi' l'requently each separate concentric cylinder is tiii'ned in order to facilitate for the expert the opening of the lock. At each rotation the paivl Q5 engages by its projection 2T in one of the recesses 24. and gives an audible signal. The number ol" these audible signals enables ai check to be made as regards the number o'f revolutions executed by the sepa-rate cylinders.

What I claiin as iny invention and desire to secure by Letters Patent of the United States is y l. A permutation lockhaving a plurality of rotatable concentric cylinders having a plurality ot radial dummy perforations therein and extending only partially therethrough, each off said cylinders having va. perforation extending entirely therethrough, said last. named perforations angulaily inclined to the radial perforations and adapted to be brought into alignment in a common plane.

2. permutation lock having an outei casing, a plurality of rotatable concentric cylinders Within said outer casing, and having a plurality ot' dummy radial pertorations therein and extending only partially therethrough. each ot said cylinders having a perforation extending entirely therethrough, said last named perforations angularly inclined to the radial per't'oiations and adapted to be brought into alignment in a common plane otfset to the axis ot the cylinders.

El. permutation lock raving an outer casing, a plurality ot rotatable concentric cylinders Within said outer casing, and having a plurality ot' dummy radial perforations therein and extending` only partially therethrough, each ol said cylinders having a pertoration extending' entirely therethrough.' said last named perforations angularly inclined to the radialA pertorations and adapted to be brought intor alignment iii a common plane offset to the axis of thc cylinders and said casing provided with a plurality-of pertorations only one ol.r vwhich .lies in the said common plane.

4. A permutation'lock having an outer casing, a plurality of rotatable" concentricalignment in a common plane oliset to the axis of the cylinders, said casing provided with a plurality of perforations only one of which lies in the saidconimoii plane ano said casing provided ivitli a.I chamber, :t spring pressed bar 'in said chamber anda pin adapted to pass through said last named.l perforations when aligned and to engage i said bar.

5. A permutation lock haring an outer casing, a plurality 01"' rotatable concentric cylinders Within said outer casing, and having aplurality of dummy radial'perforations therein. each of said cylinders having a perforation there-through, said vlastnamed perforations angularly inclined. to the radial pertorations and adapted tobe brought into alignment'in a commonplane offset toE the axis ofthe cylindersand said casing provided ivith a plurality ot perforations only one of which lies in the said common plane and said casing provided with va cl'ian'iber,

and a pin adapted to pass through said last namedl perforations when aligned and to engage said bar and mea-ns to actuate saidpin. 6. A permutation lock having` ran outer lasing. a plurality ot rotatable concentric cylinders Within said casing having a plurality of radialfdumn'iy perforations -therein each ot` said cylindeis havinga perforation therethrough, said last named perforations angularly inclined to the radial per-v 'l'orations and adapted to be `brought i'nto alignment in ,ai common plane offset to the axis of said cylinders and` said casing 'provided with a spring pressed paivl adaijiteu to enter said lastnamed perforations'to audibly indicate the rotation ot said cylinders.

In testimony W'hereo't'he atlixes his signature in presence` oi tivo .Witnesses Vitnesses lV. RILMEE, Jr., H. SCHALLENBERG.

yWILiinLMUs Koor.l 

